Unable to open 'libc-start.c'

Question

I'm trying to debug my C code in vscode, and I'm having some problems.
I'm using ubuntu and have gcc and gdb debugger installed. when I start debugging my code and reach to a line with `printf` or `scanf`, I get this error:
`Unable to open 'libc-start.c': Unable to read file '/build/glibc-eX1tMB/glibc-2.31/csu/libc-start.c' (Error: Unable to resolve nonexistent file '/build/glibc-eX1tMB/glibc-2.31/csu/libc-start.c').`
I read some answers to this question saying I have to install `glibc-source`, and I did that. then I added this to my launch.json:

"sourceFileMap": {
                "/build/glibc-S7xCS9": "/usr/src/glibc"
          }

still nothing's changed.
do you know anything that could help me? I could provide more information if needed.

Employed Russian · Accepted Answer · 2021-12-19 17:13:31Z

2

I did that. then I added this to my launch.json:
"sourceFileMap": {
               "/build/glibc-S7xCS9": "/usr/src/glibc"
         }

Your error mentions /build/glibc-eX1tMB/.... You should change glibc-S7xCS9 to glibc-eX1tMB in your .json file.

(The directory /build/glibc-.... is a temporary directory created for each separate build. You would need to change it every time you update your GLIBC version.)

I'm having some problems.

Note that there isn't an actual problem here, unless you need to debug GLIBC internals.

answered Dec 19, 2021 at 17:13

Employed Russian

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1 Comment

Nicholas Humphrey Over a year ago

Thanks, but how do I find this unique-identifier without the error message? VSCode seems to be able to find the glibc source code so it doesn't show error message, but I'm sure the unique identifier is wrong, and that's the reason it doesn't step into the source code.

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